CN102387584A - Mobile access gateway, local mobility anchor and system as well as rapid handover method of mobile access gateway - Google Patents
Mobile access gateway, local mobility anchor and system as well as rapid handover method of mobile access gateway Download PDFInfo
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Abstract
The invention relates to a mobile access gateway, a local mobility anchor and a system as well as a rapid handover method of the mobile access gateway. The mobile access gateway provided by the invention communicates with a mobile terminal and multiple other mobile access gateways, when the mobile access gateway detects that the mobile terminal is to be switched to one mobile access gateway in the multiple other mobile access gateways, a handover initiate information constructing unit constructs handover initiate information, and the constructed handover initiate information is sent to the one mobile access gateway in the other mobile access gateways through a network interface unit; and after receiving handover reply information from the one mobile access gateway through the network interface unit, a handover reply information processing unit detects whether a tunnel is built for the mobile terminal between the mobile access gateway and other mobile access gateways except the one mobile access gateway, if the tunnel is built, the tunnel is deleted, and a new tunnel is built for the mobile terminal between the mobile access gateway and the one mobile access gateway in the other mobile access gateways. By the invention, redundant tunnels are reduced and the waste of network resources is avoided.
Description
Technical field
The present invention relates to a kind of Mobile Access Gateway, local mobile anchor, proxy mobile IPv 6 system and fast switching method thereof, particularly in the proxy mobile IPv 6 system, realize Mobile Access Gateway, local mobile anchor, system and the fast switch over method thereof that mobile node switches at a plurality of cell boarders fast.
Background technology
Proxy mobile IPv 6 (Proxy Mobile IPv6 (PMIPv6) (RFC 5213)) is based on the mobility management protocol of network, and this agreement makes mobile node need not to participate in sending any and mobile relevant signaling can realize that IP moves.The IP that network terminal is in charge of mobile node moves.A mobile agent in the network sends mobile signaling protocol for mobile node to home agent, and the move operation of management mobile node.In the proxy mobile IPv 6 agreement, local mobile anchor (Local Mobility Anchor:LMA) and Mobile Access Gateway (Mobile Access Gateway:MAG)) set up bidirectional tunnel for each mobile node and transmit data.The proxy mobile IPv 6 agreement is applied to a plurality of wide area wireless networks, and like 3GPP, 3GPP2 is in WiMAX and the Local wireless network environment.
In addition; (Fast Handovers for Proxy Mobile IPv6 draft-ietf-mipshop-pfmipv6-13.txt) has described the method for the switching delay when reducing mobile node in the proxy mobile IPv 6 and between different Access Networks, switching to the quick handoff protocol of proxy mobile IPv 6.When mobile node when in the past MAG moves to new MAG network, accomplished before LMA accomplishes the mobile node binding registration at new MAG, be these mobile node forwarding data through between preceding MAG and new MAG, setting up bidirectional tunnel.
But, when mobile node switches on a plurality of MAG Access Networks border, the situation of the prediction of failure that can be moved; That is, begin to predict that mobile node will switch to a new MAG, preceding MAG and this new MAG have set up bidirectional tunnel; But mobile node has switched to another new MAG fast, and preceding MAG and this another new MAG have also set up bidirectional tunnel, so; Though the bidirectional tunnel that preceding MAG and this another new MAG set up is utilized; But and the bidirectional tunnel of setting up between this new MAG is not utilized, and has the problem that forms unemployed redundant tunnel, thereby wasted Internet resources.
Summary of the invention
The objective of the invention is to address the above problem, a kind of Mobile Access Gateway, local mobile anchor, proxy mobile IPv 6 system and fast switching method thereof are provided, can reduce redundant tunnel, reduce network resources waste.
To achieve these goals, a kind of Mobile Access Gateway of the present invention communicates with portable terminal and a plurality of other Mobile Access Gateways, it is characterized in that having: NIU, messaging; Switch and initiate the message constructing unit, structure switches initiates message; And switch the answer message processing unit, handle the switching that receives and reply message; When detecting said portable terminal and will switch to Mobile Access Gateway among said a plurality of other Mobile Access Gateways; Said switching is initiated the switching of message constructing unit structure and is initiated message, and sends to a said Mobile Access Gateway through the switching initiation message that said NIU will be constructed; After the switching answer message that receives through said NIU from a said Mobile Access Gateway; Said switching is replied message processing unit and is detected whether set up the tunnel at said Mobile Access Gateway with between said other Mobile Access Gateways the Mobile Access Gateway for said portable terminal; If set up the tunnel; Then delete this tunnel, and between a said Mobile Access Gateway and a said Mobile Access Gateway, set up the tunnel for this portable terminal.
Local mobile anchor of the present invention communicates with a plurality of Mobile Access Gateways, it is characterized in that having: NIU, messaging; And the handoff completion message processing unit, handle the handoff completion message that receives; When receive through said NIU from a Mobile Access Gateway among a plurality of Mobile Access Gateways, be illustrated between another Mobile Access Gateway among this Mobile Access Gateway and a plurality of Mobile Access Gateway when having set up the handoff completion message in tunnel for portable terminal, whether said handoff completion message processing unit detects at this another Mobile Access Gateway and between this a plurality of Mobile Access Gateways the Mobile Access Gateway, is said mobile end.
Proxy mobile IPv 6 of the present invention system comprises the local mobile anchor that communicates through network, a plurality of Mobile Access Gateway and mobile node, it is characterized in that said Mobile Access Gateway is aforesaid Mobile Access Gateway.
Mobile Access Gateway fast switch over method of the present invention; Said Mobile Access Gateway and portable terminal and a plurality of other Mobile Access Gateways communicate; It is characterized in that; When detecting said portable terminal and will switch to Mobile Access Gateway among said a plurality of other Mobile Access Gateways, structure switches initiates message, and sends to a said Mobile Access Gateway through the switching initiation message that said NIU will be constructed; After the switching answer message that receives through said NIU from a said Mobile Access Gateway; Detect and whether set up the tunnel for said portable terminal at said Mobile Access Gateway with between said other Mobile Access Gateways the Mobile Access Gateway; If set up the tunnel; Then delete this tunnel, and between a said Mobile Access Gateway and a said Mobile Access Gateway, set up the tunnel for this portable terminal.
Mobile Access Gateway fast switch over method of the present invention; Said Mobile Access Gateway and local mobile anchor and a plurality of Mobile Access Gateway communicate; It is characterized in that; When institute's local mobile anchor receive from a Mobile Access Gateway among a plurality of Mobile Access Gateways, be illustrated between another Mobile Access Gateway among this Mobile Access Gateway and a plurality of Mobile Access Gateway when having set up the handoff completion message in tunnel for portable terminal; Whether detect is that to have set up the tunnel be redundant tunnel to said portable terminal at this another Mobile Access Gateway with except that this a plurality of Mobile Access Gateways the Mobile Access Gateway between; If set up redundant tunnel, then message is deleted in the tunnel in the said redundant tunnel of structure expression deletion, and sends to the corresponding mobile IAD.
According to the present invention, when current MAG detected mobile node and will switch to new MAG network, preceding MAG sent to switch to new MAG and initiates message, and new MAG replys to switch and replys message.After preceding MAG received HAck message, at first whether inspection had set up the tunnel for this mobile node, if set up the tunnel, then deletes this tunnel, sets up the tunnel with new MAG again.So the redundant tunnel that causes owing to the moving projection failure in the time of can avoiding mobile node between a plurality of MAG networks, to switch can reduce network resources waste.
Description of drawings
Fig. 1 is the allocation plan that expression mobile node of the present invention can switch the proxy mobile IPv 6 system of MAG Access Network fast.
Fig. 2 A is the schematic block diagram of the formation of expression MAG of the present invention.
Fig. 2 B is the sketch map of the tunnel database of record among the MAG of the present invention.
Fig. 3 A is the sketch map that the form of (HI) message is initiated in expression switching of the present invention.
Fig. 3 B is the sketch map that the form of (HAck) message is replied in expression switching of the present invention.
Fig. 4 is that expression MAG of the present invention handles the flow chart that switches answer (HAck) message.
Fig. 5 is the expression signaling flow graph that switches fast through MAG control of the present invention.
Fig. 6 A is the block diagram that expression LMA of the present invention constitutes.
Fig. 6 B is the sketch map that multicast switches database of record among the expression LMA of the present invention.
Fig. 7 A is expression switching notice of the present invention (HON) message and the sketch map that switches the form of accomplishing (HOF) message.
Fig. 7 B is the sketch map of the form of expression tunnel deletion of the present invention (TD) message.
Fig. 8 is the expression signaling flow graph that switches fast through LMA control of the present invention.
Fig. 9 is the expression signal of base station intensity of utilizing of the present invention, controls the allocation plan of the system of quick switching through LMA.
Figure 10 A is an expression schematic block diagram of utilizing the formation of the LMA that signal of base station intensity controls quick switching of the present invention.
Figure 10 B is the expression sketch map that utilizes multicast among the LMA that signal of base station intensity controls quick switching to switch database of record of the present invention.
The sketch map of the form of (HI) message is initiated in the switching of Figure 11 A when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.
The sketch map of the form of Figure 11 B switching notice (HON) message/switchings completion (HOF) message when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.
The sketch map of the form of the network state message of Figure 11 C when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.
The network state signaling flow graph of Figure 12 when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.
Figure 13 is the flow chart that expression LMA of the present invention handles network state message.
Figure 14 is the expression signal of base station intensity of utilizing of the present invention, controls the signaling flow graph of quick switching through LMA.
Embodiment
The embodiment that present invention will be described in detail with reference to the accompanying.Following embodiment only is used to illustrate content of the present invention, and conduct is not to qualification of the present invention.
< structure of proxy mobile IPv 6 system >
At first, with reference to Fig. 1 proxy mobile IPv 6 of the present invention system is described.Fig. 1 is the allocation plan that expression mobile node of the present invention can switch the proxy mobile IPv 6 system of MAG Access Network fast.
As shown in Figure 1, system comprises Mobile Access Gateway (abbreviating " MAG " as) MAG11, MAG12, MAG13, local mobile anchor (abbreviating " LMA " as) 2, core net (network) 3 and mobile node (abbreviating " MN " as) (portable terminal) 4.Wherein, the definition of relevant Mobile Access Gateway, local mobile anchor and mobile node etc. are specifically referring to the proxy mobile IPv 6 agreement.
MAG11, MAG12, MAG13 insert mobile node 4 down, communicate with self other MAG in addition through network and mobile node 4.The IP of MAG management mobile node 4 moves, and replaces mobile node 4 to send and mobile relevant signaling, and mobile node 4 does not participate in sending and mobile relevant signaling.LMA2 inserts MAG11, MAG12, MAG13 down, is the home agent of mobile node 4, is connected through core net 3.
Shown in the dotted line of Fig. 1, move to the network coverage of MAG12 from the network coverage of MAG11 at mobile node 4; Moving to again then under the situation of MAG13 network coverage, can be that this mobile node 4 is transmitted data through between MAG11 (below be called " preceding MAG ") and MAG12 or MAG13 (the following MAG that will switch to is called " new MAG " or " target MAG "), setting up the tunnel.
< structure of Mobile Access Gateway MAG >
In this execution mode, MAG is improved, its function is expanded.Below, the structure of Mobile Access Gateway MAG of the present invention is described with reference to Fig. 2 A.Fig. 2 A is the schematic block diagram of the formation of expression MAG of the present invention.
Shown in Fig. 2 A, Mobile Access Gateway MAG has NIU 10, HI (Handover Initiate: switch initial) message processing unit 14, memory cell 15, HI message constructing module 16, bus 17, HAck (Handover Acknowledgement: switch and reply) message processing unit 18 and control unit 19.
NIU 10 is used for communicating with outside device (LMA, other MAG, MN etc.), receives, sends various message.NIU 10 comprises HI/HAck message monitoring (reception) module 101 and HI/HAck message transmission module 103.HI/HAck message is monitored module 101 and is used to monitor HI message, the HAck message of sending the outside.HI/HAck message transmission module 103 is used to send HI message, HAck message.About the form of HI message and HAck message, will at length explain with reference to Fig. 3 A and Fig. 3 B afterwards.
HI message processing unit 14 is handled through the HI/HAck message of NIU 10 and is monitored the HI message that module 101 receives from the outside; And call its HAck message constructing module 141 that has and construct the HAck message that this HI message is replied, send the HAck message of being constructed to the outside through the HI/HAck message transmission module 103 of NIU 10 then.
Memory cell 15 is made up of memory elements such as hard disk, flash card, ROM, RAM; Storing therein multicast switch data storehouse 151, in this multicast switch data storehouse 151, is storing the multicast that has write down the multicast handover-related message that receives and is switching record tabulation 1511.Relevant multicast switches the particular content of record tabulation 1511, will at length explain with reference to Fig. 2 B afterwards.
HI message constructing unit 16 is used to construct HI message.For example; Move to from the network coverage of MAG11 at mobile node 4 under the situation of network coverage of MAG12; Mobile Access Gateway MAG11 detects mobile node 4 will switch to MAG12 (new MAG) afterwards from MAG11 (preceding MAG); The HI message are constructed in HI message constructing unit 16, and send the HI message of being constructed to MAG12 via the HI/HAck message transmission module 103 of NIU 10.
The HI/HAck message that HAck message processing unit 18 is used to handle through NIU 10 is monitored the HAck message that module 101 receives.When HAck message processing unit 18 was handled HAck message, at first whether inspection had set up the tunnel for the mobile node in this HAck message.If check out and set up the tunnel, then delete this tunnel, structure the past MAG is to the tunnel of new MAG then.If check out and do not set up the tunnel, then directly construct the tunnel of the past MAG to new MAG.HAck message processing unit 18 comprise whether be used to detect for mobile node 4 set up the tunnel tunnel inspection module 181, be used to delete the tunnel removing module 183 in the redundant tunnel of having set up and be used to construct a plurality of modules such as tunnel construction module 185 in new tunnel.The relevant HAck message processing unit 18 that is made up of a plurality of modules is handled the example of HAck message, will at length explain with reference to Fig. 4 afterwards.
Each unit and the module of 19 couples of MAG of control unit are controlled.Particularly; When detecting mobile node 4 and want that MAG switches to new MAG in the past, or when receiving handoff trigger message (HO Initiate message for example shown in Figure 5); Control unit 19 calls HI message constructing unit 16 structure HI message, and calls NIU 10 and send this HI message to new MAG.When receiving the HI message of sending from the outside through NIU 10, control unit 19 calls HI message processing unit 14 and handles this HI message, the HAck message that structure is replied this HI message.When receiving HAck message, call HAck processing unit 18 and handle HAck message through NIU 10.
Below, the multicast of being stored referring to the tunnel database of record 151 among the MAG shown in Fig. 2 B further explanatory drawings 2A switches record tabulation 1511.Fig. 2 B is the sketch map of the tunnel database of record among the MAG of the present invention.
Shown in Fig. 2 B, in tunnel database of record 151, storing tunnel record tabulation 1511, in this tunnel record tabulation 1511, comprise following field: sequence number 15111, MN address 15113, destination address 15115, life cycle 15117.Wherein, sequence number 15111 representes that this is recorded in the sequence number in the database.The address of MN address 15113 expression mobile nodes 4.The address of the new MAG that destination address 15115 expression mobile nodes 4 switch to.Represent the effective time of these records life cycle 15117.
Then, specify the form of HI message and HAck message with reference to Fig. 3 A and Fig. 3 B.Fig. 3 A is the sketch map of the form of expression HI message of the present invention, and Fig. 3 B is the sketch map of the form of expression HAck message of the present invention.
Shown in Fig. 3 A, M100 is the form of HI message, comprises following field: source address M101, destination address M102, type M104, length M 106 and mobile node address M108.Wherein, Source address M101 representes to send the address of the MAG of this message; Destination address M102 representes the address of the destination that this message is sent, and type M104 representes the type of this message, is HI message at this; The length of length M 106 these message of mark, the address that mobile node address M108 is writing down the mobile node that will switch MAG.
Shown in Fig. 3 B, M200 is the form of HAck message, comprises following field: source address M201, destination address M202, type M204, length M 206 and mobile node address M208.Wherein, Source address M201 representes to constitute the address of the MAG of this message; Destination address M202 representes the address of the destination that this message is sent out, and type M204 representes the type of this message, is HAck message at this; The length of length M 206 these message of mark, mobile node address M208 has duplicated the mobile node address M108 in the HI message of sending.
Below, with reference to Fig. 4, illustrate the process of handling HAck message when mobile node switches MAG.Fig. 4 is the flow chart that expression MAG of the present invention handles HAck message.
As shown in Figure 4, the HI/HAck message of MAG is monitored module 101 and is regularly monitored various message (step F 101) repeatedly.After HI/HAck message is monitored module 101 to receive HAck message (step F 102); HAck message processing unit 18 begins to handle this HAck message; At first extract the mobile node address in this HAck message, whether 181 inspections of tunnel inspection module have set up tunnel (step F 103) for this mobile node between preceding MAG and other MAG except that new MAG then.Set up the tunnel if inspection module 181 in tunnel is checked out, then tunnel removing module 183 is deleted these tunnels (step F 104), and tunnel construction module 185 is that this mobile node is set up the tunnel (step F 105) of the past MAG to new MAG then.Do not set up the tunnel if inspection module 181 in tunnel is checked out, then tunnel construction module 185 is directly set up the tunnel (step F 106) of the past MAG to new MAG.
Below, with reference to Fig. 5 the detailed process of MAG of the present invention when mobile node switches MAG fast is described.Fig. 5 is the expression signaling flow graph that switches fast through MAG control of the present invention.
As shown in Figure 5, at first, mobile node 4 is through preceding MAG11 transceive data (S101).
When mobile node 4 detects the scope that self will move to from the scope as the MAG11 network coverage of preceding MAG as the MAG12 network coverage of new MAG; MAG11 sends and switches initial (HOInitiate) message forward, comprises the address information (S102) of new MAG12 in this message.
After preceding MAG11 receives this switching initial message, the HI message constructing unit 16 structure HI message of preceding MAG11, and, comprise the address information (S103) of mobile node 4 in this HI message to new this HI message of MAG12 transmission.
After new MAG12 receives the HI message from preceding MAG11 through HI/HAck message monitoring module 101; HI message processing unit 14 is handled this HI message; The HAck message that HAck message constructing module 141 structures are replied this HI message is passed through HI/HAck message transmission module 103 MAG11 answer HAck message (S105) forward then.
After preceding MAG11 received the HAck message of new MAG12 answer through HI/HAck message monitoring module 101, whether 181 inspections of tunnel inspection module had set up the tunnel for this mobile node 4 between preceding MAG11 and other MAG (is MAG13 at this).At this moment, because do not set up the tunnel, so tunnel construction module 185 is directly set up the tunnel (S107) of the past MAG11 to new MAG12.So, after mobile node 4 switches to new MAG12, just can continue the transmission data through the tunnel between preceding MAG11 and the new MAG12.
Afterwards, mobile node 4 detects the scope that moves the MAG13 network coverage again from the scope of the MAG12 network coverage, and this moment, MAG13 was new MAG, and mobile node 4 MAG11 forward sends the switching initial message, comprises the address information (S109) of new MAG13 in this message.
Preceding MAG11 receives when representing that mobile node 4 will switch to the switching initial message of new MAG13, the HI message constructing unit 16 structure HI message of preceding MAG11, and, comprise the address information (S110) of mobile node 4 in this HI message to new MAG13 transmission HI message.
After new MAG13 receives the HI message from preceding MAG11 through HI/HAck message monitoring module 101; HI message processing unit 14 is handled this HI message; The HAck message that HAck message constructing module 141 structures are replied this HI message is passed through HI/HAck message transmission module 103 MAG11 answer HAck message (S111) forward then.
After preceding MAG11 receives the HAck message of new MAG13 answer through HI/HAck message monitoring module 101; Whether 181 inspections of tunnel inspection module have set up the tunnel for this mobile node 4, promptly redundant tunnel (S113) between preceding MAG11 and other MAG (is MAG12 at this).At this moment; Be checked through and between preceding MAG11 and MAG12, set up the tunnel for this mobile node 4; So 183 deletion the past of tunnel removing module MAG11 is to the tunnel (S113) of MAG12, and tunnel construction module 185 rebulids the tunnel (S115) of the past MAG11 to new MAG13.
After mobile node 4 switches to new MAG13 network, just can continue transmission data (S117) through the tunnel between preceding MAG11 and the new MAG13.
So, when between a plurality of MAG networks, moving (switching fast) fast at mobile node, also quick switching be can realize, the redundant tunnel set up because of the moving projection failure, minimizing network resources waste avoided simultaneously.
< structure of local mobile anchor LMA >
In this execution mode, LMA improves to local mobile anchor, and its function is expanded.Below, the structure of LMA of the present invention is described with reference to Fig. 6 A.Fig. 6 A is the block diagram that expression LMA of the present invention constitutes.
Shown in Fig. 6 A, LMA2 comprises that (switching notice: Handover Notification) message processing unit 24, memory cell 25, HOF (switch and accomplish: Handover Finish) message processing unit 26, bus 27 and control unit 29 for NIU 20, HON.
NIU 20 is used for receiving, sending various message, and (the tunnel deletion: Tunnel Delete) message transmission module 203 to comprise HON/HOF message monitoring (reception) module 201 and TD.HON/HOF message is monitored module 201 and is used to monitor the HON message that is used to notify switching, the completed HOF message of expression switching of sending the outside.TD message transmission module 203 is used to send the TD message in the redundant tunnel of expression deletion.About the form of HON message, HOF message and TD message, will at length explain with reference to Fig. 7 A and Fig. 7 B afterwards.
HON message processing unit 24 is used to handle the HON message that receives through NIU 20, and during processing, that calls that its included multicast switches that logging modle 241 comes that recorder arrives switches relevant information with multicast.
Memory cell 25 is made up of memory elements such as hard disk, flash card, ROM, RAM; Storing therein multicast switch data storehouse 251, in this multicast switch data storehouse 251, is storing the multicast that has write down the multicast handover-related message that receives and is switching record tabulation 2511.Relevant multicast switches the particular content of record tabulation 2511, will at length explain with reference to Fig. 6 B afterwards.
HOF message processing unit 26 is used to handle the HOF message that receives through NIU 20, comprises that multicast switches inspection module 261, TD message constructing module 263 and multicast and switches record update module 265.When handling HOF message, multicast switches 261 inspections of inspection module and in multicast switch data storehouse 251, whether stores a plurality of multicasts switching records about the mobile node in the HOF message.If there are a plurality of records, then call TD message constructing module 263 structure TD message, send this TD message through TD message transmission module 203 to relevant MAG then.And then call the multicast switching and write down the multicast switching record that update module 265 is upgraded this mobile node in the multicast switch data storehouse 251.
Each unit and the module of 29 couples of LMA of control unit are controlled.
Below, switch the multicast switching record tabulation 2511 that database of record 251 is stored referring to the multicast among the LMA shown in Fig. 6 B further explanatory drawings 6A.Fig. 6 B is the sketch map that multicast switches database of record among the expression LMA of the present invention.
Shown in Fig. 6 B; In multicast switching database of record 251, store multicast handoff list 2511, in multicast handoff list 2511, comprising following field: sequence number 25111, MN address 25113, NMAG address 25115, multicast address 25117, PMAG address 25119, status indication 25121.Wherein, sequence number 25111 representes that this is recorded in the sequence number in the multicast switch data storehouse 251.The mobile node address that 25113 expressions of MN address are switched.The address of the new MAG of NMAG address 25115 expressions.The multicast group that multicast address 25117 these mobile nodes of expression add.The address of MAG before 25119 expressions of PMAG address.The type of the switching notice that status indication 25121 expressions receive is HON or HOF.
The form of HON message, HOF message and TD message then, at length is described with reference to Fig. 7 A and Fig. 7 B.Fig. 7 A is the sketch map of the form of expression HON message of the present invention and HOF message.Fig. 7 B is the sketch map of the form of expression TD message of the present invention.
Shown in Fig. 7 A, M400 is the form of HON message and HOF message, comprises following field: source address M401, destination address M402, type M404, length M 406, MN address 408, multicast address M410, PMAG address M412 and status indication M414.Wherein, source address M401 representes the address of new MAG.Destination address M402 representes the address of LMA.Type M404 representes that the type of this message is that multicast switches message, comprises HON and HOF message.The length of length M 406 these message of expression.The address of the mobile node that MN address M408 indicates to switch.Multicast address M410 representes to switch the multicast group address that mobile node adds.MAG address before PMAG address M412 representes to switch.STA representation M414 representes the switching state of mobile node, representes when being " 0 " to prepare to switch, and representes that this type of message is a HON message, representes to accomplish switching when being " 1 ", representes that this type of message is a HOF message.
Shown in Fig. 7 B, M600 is the form of TD message, comprises following field: source address M601, destination address M602, type M604, length M 606, MN address M608, multicast address M610 and PMAG address M612.Wherein, source address M601 representes the address of LMA.Destination address M602 representes the address of new MAG.Type M604 representes that the type of this message is a TD message.The length of length M 606 these message of expression.MN address M608 representes the address of mobile node.Multicast address M610 representes the multicast group address that mobile node adds.MAG address before PMAG address M612 representes to switch.
Below, explain that with reference to Fig. 8 the present invention comes the detailed process of switching fast through LMA.Fig. 8 is the expression signaling flow graph that switches fast through LMA control of the present invention.
As shown in Figure 8, at first, mobile node 4 is connected with preceding MAG11, and through preceding MAG11 transceive data (S201).
When mobile node 4 detected the scope of self wanting the MAG11 network coverage in the past and moves to the scope of the new MAG12 network coverage, MAG11 sent and switches initial (HO Initiate) message (S202) forward, wherein comprises the address information of target MAG12.After preceding MAG11 receives this switching initial message, send HI message (S203), wherein comprise the address information and the multicast group information of mobile node 4 to new MAG12.After new MAG12 received HI message, MAG11 replied HAck message (S205) forward, simultaneously, sent HON (switching notice) message (S206) to LMA2, and this mobile node 4 of notice LMA2 will switch in the MAG12 network.The HON/HOF message of LMA2 is monitored module 201 and is received after the HON message from MAG12, and multicast switches logging modle 241 multicast switching information record contained in the HON message is switched in the record tabulation 2511 to the multicast that multicast switches in the record database 251.Before after MAG11 receives the HAck message of sending from new MAG12, be that mobile node 4 is set up in the past MAG11 to the tunnel (S207) of new MAG12.
Afterwards, mobile node 4 detects again and will switch to MAG13, so MAG11 sends and switches initial message (S209) forward.Preceding MAG11 sends HI message (S210) to new MAG13.After new MAG13 received HI message, MAG11 replied HAck message (S211) forward, simultaneously, sent HON message (S213) to LMA2.The multicast of LMA2 switches logging modle 241 will be monitored in the HON message from MAG13 that module 201 receives contained multicast switching information record through HON/HOF message and switch in the record tabulation 2511 to the multicast that multicast switches in the record database 251.After preceding MAG11 receives HAck message, be that mobile node 4 is set up the tunnel (S214) of the past MAG11 to new MAG13.
Afterwards, mobile node 4 detects again and will switch to MAG14, so MAG11 sends and switches initial message (S215) forward.Preceding MAG11 sends HI message (S216) to new MAG14.After new MAG14 received HI message, MAG11 replied HAck message (S217) forward, simultaneously, sent HON message (S218) to LMA2.The multicast of LMA2 switches logging modle 241 will be monitored in the HON message from MAG14 that module 201 receives contained multicast switching information record through HON/HOF message and switch in the record tabulation 2511 to the multicast that multicast switches in the record database 251.After preceding MAG11 receives HAck message, be that mobile node 4 is set up the tunnel (S219) of the past MAG11 to new MAG14.
After mobile node 4 was connected to new MAG14, MAG14 sent HOF message (S220) to LMA2, and notice mobile node 4 has been accomplished switching.After the HON/HOF message monitoring module 201 of the NIU 20 of LMA2 receives this HOF message; The multicast of HOF message processing unit 26 switches inspection module 261 inspection multicasts switching database of records 251 and whether stores a plurality of multicasts switching records about the mobile node in the HOF message 4; That is, detect whether redundant tunnel is arranged.At this moment; Because there are three tunnels such as MAG11 to MAG12, MAG11 to MAG13, MAG11 to MAG14; So TD message constructing module 263 is configured to delete the TD message in MAG11 to MAG12, these two redundant tunnels of MAG11 to MAG13; Send TD message (S221) to MAG13, send TD message (S222) to MAG12 simultaneously, the relevant MAG of notice deletes redundant tunnel respectively.Then, multicast switches the multicast switching record that record update module 265 is upgraded this mobile node 4 in the multicast switch data storehouse 251.
So, the tunnel transceive data of mobile node 4 through between preceding MAG11 and new MAG14, setting up.When mobile node 4 moves fast, also quick switching be can realize between a plurality of MAG networks, the redundant tunnel set up because of the moving projection failure, minimizing network resources waste avoided.
< structure of the proxy mobile IPv 6 system of band signal intensity report >
Another example of proxy mobile IPv 6 of the present invention system at first, is described with reference to Fig. 9.Fig. 9 is the expression signal of base station intensity of utilizing of the present invention, controls the allocation plan of the system of quick switching through LMA.
As shown in Figure 9, this system comprises MAG11, MAG12, MAG13, LMA32, core net 3, mobile node 4 and base station 51,52,53.Wherein, the definition of relevant Mobile Access Gateway MAG, local mobile anchor LMA and mobile node MN etc. are specifically referring to the proxy mobile IPv 6 agreement.
MAG11, MAG12, MAG13 insert mobile node 4 51,52,53 times through the base station respectively, communicate through network and mobile node 4, base station and other MAG beyond self.The IP of MAG management mobile node 4 moves, and replaces mobile node 4 to send and mobile relevant signaling, and mobile node 4 does not participate in sending and mobile relevant signaling.LMA32 inserts MAG11, MAG12, MAG13 down, is the home agent of mobile node 4, is connected through core net 3.
< structure of the local mobile anchor LMA of band signal intensity report >
In the present invention, LMA improves to local mobile anchor, and its function is expanded.Below, the structure of the LMA of band signal intensity of the present invention report is described with reference to Figure 10 A.Figure 10 A is an expression schematic block diagram of utilizing the formation of the LMA that signal of base station intensity controls quick switching of the present invention.
Shown in Figure 10 A, LMA32 comprises NIU 30, HON handoff notification message processing unit 24, memory cell 35, HOF message processing unit 26, bus 27, control unit 29 and network state message processing unit 38.Compare with Fig. 6 A, HON message processing unit 24, HOF message processing unit 26, bus 27 are basic identical, omit the explanation of these unit at this.
NIU 30 comprises HON/HOF message monitoring module 201, TD message transmission module 203 and network state message monitoring module 305.Identical with Fig. 6 A, HON/HOF message is monitored module 201 and is monitored outside HON and HOF message of sending, and TD message transmission module 203 is sent redundant tunnel deletion message.Network state message is monitored the network state message that module 305 is monitored the outside expression network state of sending.About the form of HI message, HON message, HOF message and network state message, will at length explain with reference to Figure 11 A～Figure 11 C afterwards.
Memory cell 35 is made up of memory elements such as hard disk, flash card, ROM, RAM; Storing therein multicast switch data storehouse 351, in this multicast switch data storehouse 251, is storing the multicast that has write down the multicast handover-related message that receives and is switching record tabulation 35111.Relevant multicast switches the particular content of record tabulation 3511, will at length explain with reference to Figure 10 B afterwards.
Network state message processing unit 38 is handled through network state message and is monitored the network state message that module 305 receives; The inspection information relevant that network state information comprised with signal strength signal intensity; If this signal strength signal intensity is lower than the threshold value of predesignating; Then TD message constructing module 263 structure TD message are sent TD message through TD message transmission module 203 to relevant MAG again.
Below, switch database of record 351 referring to the multicast among the LMA shown in Figure 10 B further explanatory drawings 10A.Figure 10 B is the expression sketch map that utilizes multicast among the LMA that signal of base station intensity controls quick switching to switch database of record of the present invention.
Shown in Figure 10 B; In multicast switching database of record 351, store multicast handoff list 3511, in multicast handoff list 3511, comprising following field: sequence number 25111, MN address 25113, NMAG address 25115, multicast address 25117, PMAG address 25119, status indication 25121, signal strength signal intensity 25123.Compare with the multicast handoff list 2511 contained fields of Fig. 6 B, increased signal strength signal intensity 25123.The detected signal of base station intensity of signal strength signal intensity 25123 expression mobile nodes.
The form of HI message, HON message, HOF message and network state message then, at length is described with reference to Figure 11 A～Figure 11 C.The sketch map of the form of the HI message of Figure 11 A when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.The sketch map of the form of the HON message/HOF message of Figure 11 B when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.The sketch map of the form of the network state message of Figure 11 C when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.
Shown in Figure 11 A, M1100 representes the form of HI message, compares with the form M100 of the HI message shown in Fig. 3 A, has increased signal strength signal intensity M109 field.Signal strength signal intensity M109 record mobile node 4 detected signal of base station intensity.
Shown in Figure 11 B, M1400 representes the form of HON/HOF message, compares with the form M400 of the HON/HOF message shown in Fig. 7 A, has increased field signal strength signal intensity M415.Signal strength signal intensity M415 record mobile node 4 detected signal of base station intensity.
Shown in Figure 11 C, M500 is the form of network state message, comprises following field: source address M501, destination address M502, type M504, length M 506, MN address M508 and signal strength signal intensity M509.Wherein, source address M501 representes the address in the source of sending.Destination address M502 representes recipient's address.Type M504 representes that the type of this message is a network state message.The length of length M 506 these message of expression.MN address M508 representes the address of mobile node.The detected signal of base station intensity of signal strength signal intensity M509 record mobile node.
Then, with reference to Figure 12 the situation that the network state message of band signal intensity report is transmitted is described in system.The network state signaling flow graph of Figure 12 when to be that expression is of the present invention utilize signal of base station intensity to control quick switching.
Shown in figure 12; Send the network state message that comprises its detected signal of base station intensity to MAG11 at mobile node 4; Under the situation of the signal strength signal intensity (S301) of report current base station, MAG11 will give LMA32 (S302) from the network state forwards of mobile node 4.Send network state message at mobile node 4 to new MAG12, under the situation of reporting objectives signal of base station intensity (S303), MAG12 will give LMA32 (S304) from the network state forwards of mobile node 4.
Then, explain that with reference to Figure 13 the LMA of band signal intensity report of the present invention handles the flow process of network state message.Figure 13 is the flow chart that expression LMA of the present invention handles network state message.
Shown in figure 13; The network state message of LMA32 is monitored module 305 monitoring informations (F202); After network state message is monitored module 305 to receive network state message (F203); 38 pairs of these message of network state message processing unit are handled, and from this message, extract the detected signal of base station intensity of mobile node, check whether this signal strength signal intensity is lower than the threshold value of predesignating (F204).As check out and be lower than threshold value, TD message constructing module 263 structure TD message then, and this TD message (F208) sent to relevant MAG, notify the tunnel of this MAG deletion for this mobile node foundation.
Below, with reference to Figure 14 the detailed process that LMA of the present invention switches fast is described.Figure 14 is the expression signal of base station intensity of utilizing of the present invention, controls the signaling flow graph of quick switching through LMA.
Shown in figure 14, mobile node 4 is connected with preceding MAG11, and send data (S401) through its transmitting-receiving.When mobile node 4 detects will move to new MAG12 network the time, MAG11 sends and switches initial message (HO Initiate) (S402) forward, wherein comprises the address information of target MAG12.Preceding MAG11 sends HI message (S403) to new MAG12 after receiving and switching initial message, wherein comprises address information of mobile node and multicast group information.After new MAG12 received HI message, MAG11 replied HAck message (S405) forward, sent HON (switching notice) message (S406) to LMA32 simultaneously, and this mobile node of notice LMA32 will switch in the MAG12 network.After preceding MAG11 receives HAck message, be established to the tunnel (S407) of new MAG12.
Afterwards, mobile node 4 detects and will switch to MAG13, and MAG11 sends and switches initial message (S409) forward.Preceding MAG11 sends HI message (S410) to new MAG13.After new MAG13 received HI message, MAG11 replied HAck message (S411) forward, sent HON message (S413) to LMA32 simultaneously.After preceding MAG11 receives HAck message, be established to the tunnel (S414) of new MAG13.
Afterwards, mobile node 4 sends network state message (S415) to MAG11, reports detected base station signal strength.MAG11 will be through giving LMA32 (S416) from the network state forwards of mobile node 4.The network state message of LMA32 is monitored module 305 and is received after this network state message; The signal strength signal intensity that network state message processing unit 38 extracts in the received network state message; Suppose to detect this signal strength signal intensity and be lower than the threshold value of predesignating this moment; Then TD message constructing module 263 is constructed the TD message; And to MAG12 transmission TD message (S417), the multicast that the tunnel of notice deletion between MAG11 and MAG12, multicast switch this mobile node in the record update module 265 renewal multicast switch data storehouses 351 switches record.
Afterwards, mobile node 4 detects and will switch to MAG14, and MAG11 sends and switches initial message (S418) forward.Preceding MAG11 sends HI message (S419) to new MAG14.After new MAG14 received HI message, MAG11 replied HAck message (S420) forward, sent HON message (S421) to LMA32 simultaneously.After preceding MAG11 receives HAck message, be established to the tunnel (S422) of new MAG14.
After mobile node was connected to new MAG14, MAG14 sent HOF message (S423) to LMA32, and notice mobile node 4 has been accomplished switching.LMA32 inspection multicast switches database of record 251; Discovery has redundant tunnel; So send TD (tunnel deletion) message (S424) to MAG13, the redundant tunnel of notice deletion, the multicast that multicast switching record update module 265 is upgraded this mobile node in the multicast switch data storehouse 351 switches record.Mobile node 4 is through new MAG14 transceive data.
More than, execution mode involved in the present invention has been described, but has been the invention is not restricted to above-mentioned execution mode, in invention aim scope of the present invention, can also carry out various distortion and expansion, or delete and make up forming structure.
For example, in execution mode, explained when mobile node switches fast that the switching initial message that MAG sends through mobile node detects this mobile node and will switch between a plurality of MAG.But the invention is not restricted to this, also can send the message that the expression mobile node will switch MAG to MAG by the base station that communicates with this mobile node.Certainly, MAG also can detect mobile node through other known technologies and whether switches MAG.
In addition, in execution mode, examples of applications under the IPv6 agreement has been described, but has been the invention is not restricted to this, can also be applicable to various technology such as IPv4.
In addition; Unit such as the NIU 10 among the MAG shown in Fig. 2 A, HI message processing unit 14, HAck message processing unit 18 are made up of a plurality of modules with simple function; But the invention is not restricted to this, these unit also can be integrated into a module and realize multiple function.LMA shown in Fig. 6 A, Figure 10 A is also identical.
In addition, also can be corresponding with the LMA32 shown in Figure 10 A, in MAG, be provided for receiving, the module of transmission network status message.
In addition; NIU 10 shown in Fig. 2 A comprises HI/HAck message monitoring (reception) module 101 and HI/HAck message transmission module 103; Certainly be not limited thereto; HAck message also can only be set as required monitor module and HI message transmission module or HI message monitoring module and HAck message transmission module, the NIU 20 shown in Fig. 6 A and Figure 10 A also can in like manner be provided with.
Claims (12)
1. a Mobile Access Gateway communicates with portable terminal and a plurality of other Mobile Access Gateways, it is characterized in that having:
NIU, messaging;
Switch and initiate the message constructing unit, structure switches initiates message; And
Switch and reply message processing unit, handle the switching that receives and reply message;
When detecting said portable terminal and will switch to Mobile Access Gateway among said a plurality of other Mobile Access Gateways; Said switching is initiated the switching of message constructing unit structure and is initiated message, and sends to a said Mobile Access Gateway through the switching initiation message that said NIU will be constructed;
After the switching answer message that receives through said NIU from a said Mobile Access Gateway; Said switching is replied message processing unit and is detected whether set up the tunnel at said Mobile Access Gateway with between said other Mobile Access Gateways the Mobile Access Gateway for said portable terminal; If set up the tunnel; Then delete this tunnel, and between a said Mobile Access Gateway and a said Mobile Access Gateway, set up the tunnel for this portable terminal.
2. Mobile Access Gateway as claimed in claim 1, wherein,
Said Mobile Access Gateway also comprises: switch and initiate message processing unit, handle the switching that receives and initiate message;
Said switching is initiated message processing unit and is comprised: switch and reply the message constructing module, be used for the structure switching and reply message;
Switch when initiating message when receiving through said NIU from the reception of said other Mobile Access Gateways; Said control unit is controlled said switching and is replied message constructing module structure switching answer message, and sends to this other Mobile Access Gateways through the switching answer message that said NIU will be constructed.
3. Mobile Access Gateway as claimed in claim 1, wherein,
Said switching is replied message processing unit and is comprised:
The tunnel detection module detects whether set up the tunnel at said Mobile Access Gateway with between said other Mobile Access Gateways the Mobile Access Gateway for said portable terminal;
The tunnel removing module, deletion is through the detected tunnel of detection module, said tunnel; And
The tunnel construction module is set up the tunnel for this portable terminal between a said Mobile Access Gateway and a said Mobile Access Gateway.
4. Mobile Access Gateway as claimed in claim 1, wherein,
Said NIU comprises:
Switch and initiate message transmission module, be used for sending switching and initiate message; And
Switch and reply the message sink module, be used for receiving switching and reply message.
5. like each described Mobile Access Gateway of claim 1 to 4, wherein,
Said NIU also comprises:
Switch and initiate the message sink module, be used for receiving switching and initiate message; And
Switch and reply message transmission module, be used for sending switching and reply message.
6. a local mobile anchor communicates with a plurality of Mobile Access Gateways, it is characterized in that having:
NIU, messaging; And
The handoff completion message processing unit is handled the handoff completion message that receives;
When receive through said NIU from a Mobile Access Gateway among a plurality of Mobile Access Gateways, be illustrated between another Mobile Access Gateway among this Mobile Access Gateway and a plurality of Mobile Access Gateway when having set up the handoff completion message in tunnel for portable terminal; Whether said handoff completion message processing unit detects is that to have set up the tunnel be redundant tunnel to said portable terminal at this another Mobile Access Gateway with except that this a plurality of Mobile Access Gateways the Mobile Access Gateway between; If set up redundant tunnel; Then message is deleted in the tunnel in the said redundant tunnel of structure expression deletion, and sends to the corresponding mobile IAD.
7. local mobile anchor as claimed in claim 6, wherein,
Said local mobile anchor also comprises:
The handoff notification message processing unit is handled the handoff notification message that receives, and has the multicast switching logging modle that the multicast handover information that handoff notification message comprised that receives is write down; And
Memory cell is stored the multicast handover information that said multicast switches the logging modle record;
Said handoff completion message processing unit comprises:
The multicast switch detection module; Whether switch the multicast handover information of logging modle record according to said multicast, detecting is that to have set up the tunnel be redundant tunnel to said portable terminal at this another Mobile Access Gateway with except that this a plurality of Mobile Access Gateways the Mobile Access Gateway between;
Tunnel deletion message constructing module, the tunnel deletion message in the said redundant tunnel of structure expression deletion; And
Multicast switches the record update module, and the multicast handover information of storing in the memory cell is upgraded.
8. local mobile anchor as claimed in claim 6, wherein,
Said local mobile anchor also comprises: the network state message processing unit, handle the network state message that comprises signal strength signal intensity that receives;
When the signal strength signal intensity that comprises when said network state message was lower than setting, the tunnel deletion message in tunnel was just being used in said handoff completion message processing unit structure expression deletion, and sends to the corresponding mobile IAD.
9. a proxy mobile IPv 6 system comprises the local mobile anchor that communicates through network, a plurality of Mobile Access Gateway and mobile node, it is characterized in that,
Said Mobile Access Gateway is like each described Mobile Access Gateway of claim 1 to 5.
10. a proxy mobile IPv 6 system comprises the local mobile anchor that communicates through network, a plurality of Mobile Access Gateway and mobile node, it is characterized in that,
Said local mobile anchor is like the described local mobile anchor of claim 6 to 8;
Said Mobile Access Gateway has the handoff notification message structural unit of structure handoff notification message.
11. a Mobile Access Gateway fast switch over method, said Mobile Access Gateway and portable terminal and a plurality of other Mobile Access Gateways communicate, it is characterized in that,
When detecting said portable terminal and will switch to Mobile Access Gateway among said a plurality of other Mobile Access Gateways; Structure switches initiates message, and sends to a said Mobile Access Gateway through the switching initiation message that said NIU will be constructed;
After the switching answer message that receives through said NIU from a said Mobile Access Gateway; Detect and whether set up the tunnel for said portable terminal at said Mobile Access Gateway with between said other Mobile Access Gateways the Mobile Access Gateway; If set up the tunnel; Then delete this tunnel, and between a said Mobile Access Gateway and a said Mobile Access Gateway, set up the tunnel for this portable terminal.
12. a Mobile Access Gateway fast switch over method, said Mobile Access Gateway and local mobile anchor and a plurality of Mobile Access Gateway communicate, it is characterized in that,
When institute's local mobile anchor receive from a Mobile Access Gateway among a plurality of Mobile Access Gateways, be illustrated between another Mobile Access Gateway among this Mobile Access Gateway and a plurality of Mobile Access Gateway when having set up the handoff completion message in tunnel for portable terminal; Whether detect is that to have set up the tunnel be redundant tunnel to said portable terminal at this another Mobile Access Gateway with except that this a plurality of Mobile Access Gateways the Mobile Access Gateway between; If set up redundant tunnel; Then message is deleted in the tunnel in the said redundant tunnel of structure expression deletion, and sends to the corresponding mobile IAD.
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| CN201010272721.XA CN102387584B (en) | 2010-08-31 | 2010-08-31 | Mobile access gateway, rapid handover method of mobile access gateway and proxy mobile IPv6 system |
| JP2011183732A JP2012054930A (en) | 2010-08-31 | 2011-08-25 | Mag, lma, system, and high-speed handover method of the same |
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| CN102547582B (en) * | 2010-12-20 | 2014-12-10 | 中国移动通信集团公司 | Method for transmitting multicast data, updating method of multicast tree, and system and device |
| KR101680137B1 (en) | 2015-07-21 | 2016-11-28 | 배재대학교 산학협력단 | Sdn-based terminal mobility management framework and management methof thereof |
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| CN102387584B (en) | 2014-10-22 |
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